December 2019
Intermediate to advanced
248 pages
5h 34m
English
Content preview from Designing Elixir Systems With OTPBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Build Your Functional Core
In this chapter, we showed how to build a functional core. It’s mostly datatypes and code made up of strictly functions in modules, with the same inputs producing the same outputs as often as you can. The functional core has no processes and invokes no external services. It encapsulates the bulk of the business logic.
We also built the functional core of our Mastery project. Along the way, we embraced some core programming principles.
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Build single-purpose functions
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Where possible, bring functions to data rather than bringing your data to functions.
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Name concepts with functions
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Shape functions for composition
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Build functions at a single level of abstraction
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Make decisions in function heads where possible
We’ll try to ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.